Table 1.

Samples from the air and surfaces of the ICU.

Location	Sample collected points	Nucleic acid test results		Result reporting
		The 1st test	The 2nd test
Isolation room	A: Armrests on the patient’s bed	–	\	–
	B: Desk surface of patient’s ward area	–	\	–
	C: Door handles	–	\	–
	D: Desk surface of the nurse's station	–	\	–
	E: Computer keyboard at the nurse's station	–	\	–
	F: Indoor air	+	+	+
Dressing room	G: Indoor air	–	\	–

Note: Intensely positive indicated a positive result from both the ORF1ab gene and the N gene of SARS-CoV-2.